Tangent Circles

Geometry Level 1

Three circles, with centers of Γ1\Gamma_1, Γ2\Gamma_2, Γ3\Gamma_3, are externally tangential to each other. The radius of these circles are 10, 12 and 24 respectively, What is the perimeter of Γ1Γ2Γ3\triangle\Gamma_1\Gamma_2\Gamma_3?

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